Glutaric aciduria type 3 is a naturally occurring biochemical trait in inbred mice of 129 substrains

João Leandro, Aaron Bender, Tetyana Dodatko, Carmen Argmann, Chunli Yu, Sander M. Houten

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The glutaric acidurias are a group of inborn errors of metabolism with different etiologies. Glutaric aciduria type 3 (GA3) is a biochemical phenotype with uncertain clinical relevance caused by a deficiency of succinyl-CoA:glutarate-CoA transferase (SUGCT). SUGCT catalyzes the succinyl-CoA-dependent conversion of glutaric acid into glutaryl-CoA preventing urinary loss of the organic acid. Here, we describe the presence of a GA3 trait in mice of 129 substrains due to SUGCT deficiency, which was identified by screening of urine organic acid profiles obtained from different inbred mouse strains including 129S2/SvPasCrl. Molecular and biochemical analyses in an F2 population of the parental C57BL/6J and 129S2/SvPasCrl strains (B6129F2) confirmed that the GA3 trait occurred in Sugct129/129 animals. We evaluated the impact of SUGCT deficiency on metabolite accumulation in the glutaric aciduria type 1 (GA1) mouse model. We found that GA1 mice with SUGCT deficiency have decreased excretion of urine 3-hydroxyglutaric acid and decreased levels glutarylcarnitine in urine, plasma and kidney. Our work demonstrates that SUGCT contributes to the production of glutaryl-CoA under conditions of low and pathologically high glutaric acid levels. Our work also highlights the notion that unexpected biochemical phenotypes can occur in widely used inbred animal lines.

Original languageEnglish
Pages (from-to)139-145
Number of pages7
JournalMolecular Genetics and Metabolism
Volume132
Issue number2
DOIs
StatePublished - Feb 2021

Keywords

  • Glutaric acid
  • Glutaric aciduria
  • Inbred mouse strains
  • Lysine
  • Mouse genetics

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